Patented double Diaphragm safety System

The unique double diaphragm design pairs a "safety" diaphragm with an elastic "working" diaphragm held securely at the edges. An eccentric and a connecting rod move both diaphragms up and down, at their center, and the "working" membrane transfers the gas through automatic valves. Both diaphragms enclose a pressure- and vacuum-tight intermediate safety space that can be monitored for pressure changes, and serves to prevent contamination. Combined with additional head machining and sealing rings, the double diaphragm system can dramatically enhance gas tightness.